rest mass of a photon is _ . h --> planck constant v --> frequency c --> speed of light in vacuum
hv
zero
hv/2
hcv
the energy contained in a single photon is _. h --> planck constant v --> frequency
2hv
none of these
phtoelectric effect is used for _.
lighting purpose
cooling purpose
amplification purpose
none of the above.
which particle is emitted in BETA DECAY?
photon
neutron
neutrino
neutrino is a ____ particle.
positively charged
negatively charged
neutral
sometime positively charged and some time negatively charged
the mass of neutrino particle is __.
equal to mass of neutron
equal to mass of electron
non-zero
beta particle is ___ .
excited electron particles
excited positron particle
excited electron or positron particle
super-excited photon particle
antiparticle of neutrino is __ .
positron
antineutrino
electron
anti-particle of electron is ___ .
positive electron
proton
alpha particle is _ .
helium atom with two neutron removed
helium atom with two proton removed
helium atom with two electron removed
helium atom with one electron removed